81063360 has 168 divisors, whose sum is σ = 318735456. Its totient is φ = 18524160.

The previous prime is 81063349. The next prime is 81063371. The reversal of 81063360 is 6336018.

It is an interprime number because it is at equal distance from previous prime (81063349) and next prime (81063371).

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18150 + ... + 22170.

Almost surely, 2^81063360 is an apocalyptic number.

81063360 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81063360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159367728).

81063360 is an abundant number, since it is smaller than the sum of its proper divisors (237672096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81063360 is a wasteful number, since it uses less digits than its factorization.

81063360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051 (or 4038 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 81063360 is about 9003.5193119135. The cubic root of 81063360 is about 432.7876576557.

Adding to 81063360 its reverse (6336018), we get a palindrome (87399378).

The spelling of 81063360 in words is "eighty-one million, sixty-three thousand, three hundred sixty".